Method for operating a motor vehicle having a start-stop system, and associated motor vehicle

Abstract

A method for operating a motor vehicle with a start/stop system ( 2 ) for a combustion engine ( 4 ) of a motor vehicle ( 1 ) with a device ( 3 ) for detecting an area ahead of the vehicle, wherein the start/stop system ( 2 ) stops the combustion engine ( 4 ) if a speed of the motor vehicle ( 1 ) depending on at least one signal relating to the driving dynamic of the vehicle ( 1 ) falls below a limit value, wherein the combustion engine ( 4 ) is not stopped if a road unevenness that requires decelerated driving over is detected in the area ahead of the vehicle by means of the device for detecting the area ahead of the vehicle.

1 . A method, comprising: operating a motor vehicle with a start/stop system for a combustion engine of a motor vehicle with a device for detecting an area ahead of the vehicle, wherein the start/stop system stops the combustion engine if a speed of the motor vehicle depending on at least one signal relating to the driving dynamic of the motor vehicle falls below a limit value,
 wherein   the combustion engine is not stopped if a road unevenness that requires decelerated driving over is detected in the area ahead of the vehicle by means of the device for detecting the area ahead of the vehicle.   
     
     
         2 . The method according to  claim 1 ,
 wherein   a speed bump placed on the road or a rail crossing the road is detected as a road unevenness.   
     
     
         3 . The method according to  claim 1 ,
 wherein   the device detects the road unevenness based on cameras and/or by means of laser scanners and/or radars.   
     
     
         4 . The method according to  claim 1 ,
 wherein   the motor vehicle comprises a control device, which analyzes the detected road unevenness by means of a pattern recognition algorithm, in particular by means of edge detection, and controls the entire start/stop system.   
     
     
         5 . The method according to  claim 1 ,
 wherein   the road unevenness is checked for plausibility by means of at least one piece of information.   
     
     
         6 . The method according to  claim 5 ,
 wherein   the information comprises predictive route data, preferable sign recognition data and/or position data of a GPS receiver or a navigation system.   
     
     
         7 . The method according to  claim 1 ,
 wherein   a brake pressure and/or an acceleration of the motor vehicle is taken into consideration as a signal.   
     
     
         8 . A motor vehicle, comprising:
 a start/stop system for a combustion engine with a device for detecting an area ahead of the vehicle, wherein the start/stop system is designed to stop the combustion engine if a speed of the motor vehicle depending on at least one signal relating to the driving dynamic of the motor vehicle falls below a limit value,   wherein   the start/stop system is designed to stop the combustion engine depending on a detected road unevenness in the area ahead of the vehicle.   
     
     
         9 . The motor vehicle according to  claim 8 ,
 wherein   the device is designed to detect a speed bump placed on the road or a rail crossing the road as a road unevenness.   
     
     
         10 . The motor vehicle according to  claim 8 ,
 wherein   the device is designed as a lidar, radar, camera, or laser scanner.   
     
     
         11 . The motor vehicle according to  claim 8 ,
 further comprising a control device that is designed to analyze the detected road unevenness by means of a pattern recognition algorithm, in particular by means of edge detection, and to control the entire start/stop system.   
     
     
         12 . The motor vehicle according to  claim 11 ,
 wherein   to the control device, at least one piece of information for the plausibility check, in particular route data, sign detection data, or position data from a GPS receiver or a navigation system can be transmitted.   
     
     
         13 . The motor vehicle according to  claim 11 ,
 wherein   the control device is designed to take into consideration as a signal a brake pressure and/or an acceleration of the motor vehicle.